
How many GSDs have you owned before Amber ? how old was she when you got her ? What was her mother like ?
You say she has been nervous since you got her which concerns me as
no GSD puppy should be nervous if they have been bred & raised correctly. Also I am concerned she is trying to get out of your house which is a sign that she is frightened of being in the house
There is absolutely no point in telling her off for chewing things as dogs do know have any sense of guilt or wrong doing no matter what other "experts"think Dogs do not "look guilty"they show submissive behaviour by putting their ears down & cowering down this is not guilt the dog is being submissive because they read the human body language as being aggressive. The only way to stop her is to distract her & reward the response with a titbit or toy, No amount of"telling"off will work, I have a simple rule with puppies I don't want something chewed I keep out of reach whether I am present or not, if the puppy can reach something & chews it it is
my fault.As to chewing the floor ? how on earth can she chew the floor ? which I presume is flat ? She obviously needs recreational toys such as raw Knuckle bones with meat left on them she can chew.
How long is she crated for before she starts chewing & does she have any chewable toys in with her ? Blanket chewing is part of dog behaviour making a nest or bed comfy I had a BC who chewed any duvet bedding he was given yet left Vet bed alone I never give dogs non doggy "blankets"as bedding
If she doesn't come back when she is released from the lead outside the home then don't let her off & start obedience training with her, on a daily basis not just once a week at a club, clubs are for you to learn how to train your dog & for your dog to socilaize not for your dog's sole obedience training each week.
How do you know that her playing with your other dog is not playful, GSDs as puppies & adults are very very physical & bark & grap each other as normal behaviour
You do seem to expect an awful lot from a puppy & if the whole family are not consistent in training & treated & reacting to her she,poor dog, is on a hiding to nothing
I do suggest you read "The Perfect Puppy" by Gwen Bailey it is an excellent source of advice